I know this is an old thread - but it caught my interest.
My previous Evoque was running Conti Cross Contacts, with good tread and Aquaplaned on the motorway and hit the central reservation. Thankfully it sounds like you guys haven't had quite such dramatic experiences - but I'd never buy a Conti again.
I'd like to add that M&S doesn't mean it's a winter tyre. It usually means it has a self clearing tread pattern (flings out the Mud and Snow) a winter tyre will have a snowflake symbol in a 3 peak mountain - this denotes a softer compound AND is a legal requirement in Europe where winter tyres are mandatory.
When buying used Winters - 6MM is the legal minimum tread depth in some EU countries, so if you're nipping down to The Alps - you wouldn't want to buy tyres with 7mm left as they only have 1mm useable.